Brief note reviews potential pitfalls of Plan S in sustaining funding for open access initiatives.
The most recent [Royal Historical Society document on Plan S](https://royalhistsoc.org/policy/publication-open-access/plan-s-and-history-journals/) says the following about the Open Library of Humanities (OLH): "It fails, however, to reference or explore the funding base that has made these important initiatives both possible and (to date) sustainable.
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Martin Paul Eve (2019) studied this question.
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